Frontier Doctor is an American Western television series starring Rex Allen that aired in syndication from September 26, 1958, until June 20, 1959. The series was also known as Unarmed and Man of the West. Outdoor action sequences for most episodes of Frontier Doctor were filmed on the Republic Pictures backlot in Studio City and on the Iverson Movie Ranch in Chatsworth, California, known for its huge sandstone boulders and widely recognized as the most heavily filmed outdoor shooting location in the history of Hollywood.